鄂尔多斯盆地伊陕斜坡东北部长8储层特征及影响因素  

Characteristics and Influence Factors of Chang 8 Reservior in Northeast Region of Yi-Shan Slope in Ordos Basin

作　　者：薛旭东[1] 陈波[1] 

机构地区：[1]西安石油大学油气资源学院,陕西西安710065

出　　处：《辽宁化工》2011年第5期500-504,共5页Liaoning Chemical Industry

摘　　要：通过铸体薄片、图像孔隙、扫描电镜、压汞及物性测试分析,对鄂尔多斯盆地伊陕斜坡东北部长8油层组储层的岩石学特征、孔渗特征、孔隙结构及孔隙类型等进行了研究,发现该地区长8油层组储层为低渗和特低渗储层,岩性主要是细粒岩屑长石砂岩、长石砂岩和长石岩屑砂岩,填隙物由粘土矿物、碳酸盐、次生石英和次生长石胶结物与杂基组成,孔隙式胶结,粒间孔为主,小孔细喉型和细孔微细喉型,长石以及浊沸石的溶蚀作用以及微裂缝的形成是改善储层物性最主要因素,与裂缝有关的次生孔隙构成了油气储集的主要空间。According to analysis of numerous of thin slices,image pores,scanning mirror,mercury penetration and physical preoperties,lithology characteristics,poroperm characteristics,pore configuration and poroperm types of Chang 8 oil layer in northeast region of Ordos basin were studied.The results show that the lithology characteristics in this area are topical french grey and grey green fine grain lithic feldspar-porphyry sandstone,feldspar-porphyry sandstone and feldspar-porphyry lithic sandstone;interstitial materials are consisting of clay mineral,carbonate,secondary limestone,secondary feldspar cement and miscellany;chief cement texture is porous cement;reserving space is interparticle channel;pore types are fine pore-slim throat and slim pore-tiny slim throat;and the reservoir have poor porosity and permeability.Reserving capability is controlled by sequence stratigraphy and diagenic metamorphism,while compaction is main factor to lead to the poor porosity.The secondary pore close to fracture makes up the chief reserving space of oil and gas,and the distribution of which controls the reservoir range.

关 键 词：储层特征 成岩作用 物性 裂缝 鄂尔多斯盆地 

分 类 号：TE122[石油与天然气工程—油气勘探]